System and method for regeneration of a fluid

Abstract

A method and a system for regenerating a body fluid, such as a peritoneal dialysis fluid. The body fluid is removed into an extracorporeal circuit comprising an electrofilter for removing charged ions from the body fluid, a nanofilter for removing large molecules, such as Dextran 40, and a reverse osmosis filter for concentrating the body fluid, for producing a synthetic urine to be discarded. The removed ions and large molecules are returned to the patient together with pure water from the reverse osmosis filter through an ultrafilter.

Description

[0001]The present invention relates to a method and a system for blood purification and for removal of soluble products from a body fluid. The system is particularly intended for removal of waste products from a patient having impaired or no kidney function.BACKGROUND OF THE INVENTION[0002]The international patent application No. PCT / SE2006 / 000212 filed Feb. 16 2006 with priority claimed from Feb. 16, 2005, discloses a system and method for regeneration of a fluid, in which synthetic urine is formed from a body fluid by only filtering and concentration. The synthetic urine will consequently include the substances and ions of the body fluid in the same proportions as in the body fluid but concentrated, except from larger molecules like albumin, which are filtered out before concentration. The body fluid may be plasma obtained from a plasma filter or peritoneal dialysis fluid obtained from the peritoneal cavity of a patient. Alternatively, the body fluid may be whole blood passed on o...

AI Technical Summary

Benefits of technology

[0020]FIG. 8 is a schematic view of the en

Problems solved by technology

Because it is difficult to separate urea and creatinine from sodium and potassium, such substances are excreted in the synthetic urine in the same concentrations as found in the body fluid.

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